Air Quality Index UPSC NOTE

 Why in News

  • Delhi’s air quality slipped into the “very poor” category on Saturday and is unlikely to improve over the next three days.

  • Delhi’s 24-hour average AQI was 304 (very poor) at 4 p.m. on Saturday, up from 261 (poor) a day earlier, as per the daily bulletin of CPCB.

Air Quality Index (AQI)

  • The AQI is a measure of how clean or polluted the air is.

  •  It is calculated using the concentrations of five major pollutants: 

  • Ground-level ozone, Carbon monoxide, Sulfur dioxide,Particulate matter, Nitrogen dioxide.

AQI Category and Color

The AQI is divided into six categories

  • Good (0-50): Green

  • Moderate (51-100): Yellow

  • Unhealthy for Sensitive Groups (101-150): Orange

  • Unhealthy (151-200): Red

  • Very Unhealthy (201-300): Purple

  • Hazardous (301-500): Maroon



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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Air Quality Index UPSC NOTE
Air Quality Index UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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